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Music Notation and Terminology
註釋Excerpt: ...is a third because E is the third tone from C (counting C as one) in the diatonic scale. C--G is a fifth because G is the fifth tone above C in the diatonic scale. It should be noted however that the same number-names apply even though one or both letters of the interval are qualified by sharps, flats, etc. Thus e.g., C--G ♯ is still a fifth, as are also C ♯ --G ♭ and C ♭ --G ♯ . (2) In determining the specific name of any interval (perfect fifth, major third, etc.), the half-step and whole-step (often referred to respectively as minor Pg 84 second, and major second) are used as units of measurement. The half-step is usually defined as "the smallest usable interval between two tones." Thus, C--C ♯ is a half-step, as are also B--C, F--G ♭, etc. A whole-step consists of two half-steps. C--D is a whole-step, as are also B ♭ --C, E--F ♯, F ♯ --G ♯, G ♭ --A ♭, etc. The expressions half-step and whole-step are much to be preferred to half-tone and whole-tone, as being more clear and definite. Thus e.g., the sentence "The two tones are a half-step apart" is much better than "The two tones are a half-tone apart." 185. A prime is the relation between two tones whose pitches are properly represented by the same degree of the staff. A perfect prime is one whose tones have the same pitch. Middle C sounded by piano and violin at the same time would offer an example. An augmented prime is one whose second tone is one half-step higher than the first. Ex. C--C ♯ . 186. A second is the relation between two tones whose pitches are properly represented by adjacent degrees of the staff. (The first line and first space are adjacent degrees, as are also the third line and fourth space.) A minor second is one comprising one half-step. Ex. B--C. A major second is one comprising two half-steps. Ex. B--C ♯ . An augmented second is one comprising three...